Improvement in lubricators



W. A. PRATT.

Lubricators.

Patented Oct- 7,1873.

Ulvrrnn STATES PATENT. OFFICE;

VVIIJLLAM A. PRATT, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN LUBRICATORS.

Specification forming part of Letters Patent No. 143,530, dated October7, 1873; application filed August 26, 1873. g

To all whom it may concern:

Be it known that I, WILLIAM A. PRATT, of Baltimore city, State ofMaryland, have invented a new and useful Improvement in Lubricators; andI do hereby declare that i the following is a full, clear, and exactdesists in a novel mode of applying the said valve on a sleeve thatworks over the pistonrod, as hereinafter described and claimed.

A represents the oil-reservoir of a locomotivelubricator, and B O theinlet and outlet valves, which fit, respectively, into their seats I) c,and are attached to the same rod D. These are so connected with asteam-engine that when steam is acting upon the piston during one of itsreciprocations the valve 0 is closed and the valve B opened. The oil nowflows from reservoir A into a supply-chamber, E, situated between thetwo valves.

WVhen the piston reaches the end of its throw the steam is exhausted anda vacuum created, while the valve 0 is drawn from its seat, and the oilin supply-chamber E allowed to flow out to lubricate the engine.

This general idea, or the means stated, forms no part of my invention.The rod D has been heretofore made to terminate with each valve, and tobe formed in one piece with, or :at least rigidly attached to, eachvalve. I prolong the rod D beyond the upper valve until it extendsthrough the top of the reservoir, and place the valve B upon a slidingsleeve, B whereby I can not only take up wear in either valve, but alsocan graduate with much accuracy the quantity of oil fed from thereservoir A, and consequently to the engine, at each reciprocation ofthe piston.

This sleeve may be moved by means of a screw-thread, (1, working in acorresponding one of nut, or by a screw-thread, d, working in one of thesleeves B or it may be moved by any other suitable device.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

In a lubricator, the combination of the valverod D, sliding andadjustable sleeve B, having upper valve B, valve-seat I), andsupplychamber E, substantially as and for the purpose set forth.

WVM. A. PRATT.

Witnesses WILLIAM T. MALsrER, K. HAMILTON SCHULTZ.

